﻿/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

using System;

namespace MongoDB.Driver
{
    /// <summary>
    /// The cursor type.
    /// </summary>
    public enum CursorType
    {
        /// <summary>
        /// A non-tailable cursor. This is sufficient for a vast majority of uses.
        /// </summary>
        NonTailable = 0,
        /// <summary>
        /// A tailable cursor.
        /// </summary>
        Tailable,
        /// <summary>
        /// A tailable cursor with a built-in server sleep.
        /// </summary>
        TailableAwait
    }

    internal static class CursorTypeExtensions
    {
        public static Core.Operations.CursorType ToCore(this CursorType cursorType)
        {
            switch (cursorType)
            {
                case CursorType.NonTailable:
                    return Core.Operations.CursorType.NonTailable;
                case CursorType.Tailable:
                    return Core.Operations.CursorType.Tailable;
                case CursorType.TailableAwait:
                    return Core.Operations.CursorType.TailableAwait;
                default:
                    throw new ArgumentException("Unrecognized CursorType.", "cursorType");
            }
        }
    }
}
